請問那裏買鋁殻電阻
Want to get some 20W Aluminium shell resistor, but could nto found it in Sam Shui Po,Any CHING would tell me where to get them? 旺角老麥有....不過唔平.{:1_331:}
我用個d係二手拆機貨應該唔o岩師兄{:6_203:}
麥氏有呀 乜解一定要鋁殻呢?貪佢散熱快? YYSKY 發表於 2013-3-26 02:20 static/image/common/back.gif
乜解一定要鋁殻呢?貪佢散熱快?
嗱,我都未用過架! 都係睇書咋, 因為用係放大管陰極电阻, 电流大. 發熱高, 以免在高温下影响阻值.用鋁殼就可減少影响!
以前都係用水泥电阻, (平好多), 其實唔知係米差好遠?
其實除了散熱外, 對音質有冇影响呢? YYSKY 發表於 2013-3-26 02:20 static/image/common/back.gif
乜解一定要鋁殻呢?貪佢散熱快?
剛看到鋁殼電阻好似都係水泥電阻加鋁殼{:1_329:}
http://www.mayloon.com.hk/joomla15/index.php?option=com_content&view=article&id=220%3Aaluminum-housed-wire-wound-power-resistor-wwr-ah-type&catid=62%3Acement-resistor-data-more&Itemid=1
增加散熱效果用 {:8_376:} chanwt 發表於 2013-3-26 07:32 static/image/common/back.gif
嗱,我都未用過架! 都係睇書咋, 因為用係放大管陰極电阻, 电流大. 發熱高, 以免在高温下影响阻值.用鋁殼就 ...
可以借殼散熱,又或者多支並聯分散熱力,Ohm數漂移會少啲,用靚電阻並聯就最佳。 試試上RS網搜尋下啦。
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